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Liquid crystal display element, liquid crystal alignment treatment agent, and liquid crystal alignment film

A technology of liquid crystal alignment film and liquid crystal alignment, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of large power consumption, etc.

Active Publication Date: 2016-05-04
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the standard type element needs to constantly apply a voltage in order to obtain a transmissive state, so it consumes a lot of power when it is used in a transparent state, such as window glass

Method used

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  • Liquid crystal display element, liquid crystal alignment treatment agent, and liquid crystal alignment film
  • Liquid crystal display element, liquid crystal alignment treatment agent, and liquid crystal alignment film
  • Liquid crystal display element, liquid crystal alignment treatment agent, and liquid crystal alignment film

Examples

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Effect test

Embodiment

[0269] The following examples are given to illustrate the present invention in more detail, but they are not limitedly interpreted. In addition, the abbreviations of the compounds used in the synthesis example, the Example, and the comparative example are as follows.

[0270]

[0271] (liquid crystal) L1: MLC-6608 (manufactured by MERCK CORPORATION)

[0272] (polymerizable compound) R1: a compound represented by the following formula [R1]

[0273] (Photoinitiator) P1: a compound represented by the following formula [P1]

[0274]

[0275] (specific cellulosic polymer)

[0276] CE-1: Hydroxyethylcellulose (manufactured by Wako Pure Chemical Industries, Ltd.)

[0277] CE-2: Hydroxypropylmethylcellulose phthalate (manufactured by ACROS)

[0278] (alkoxysilane monomer)

[0279] E1: Alkoxysilane represented by the following formula [E1]

[0280] E2: Octadecyltriethoxysilane

[0281] E3: 3-methacryloxypropyltrimethoxysilane

[0282] E4: 3-Ureapropyltriethoxysilane

[02...

Synthetic example 1

[0305] In a 200ml four-necked reaction flask equipped with a thermometer and a reflux tube, ECS (28.3g), E1 (4.10g), E3 (7.45g) and E5 (32.5g) were mixed to prepare a solution of the alkoxysilane monomer. A solution prepared by mixing ECS ​​(14.2 g), water (10.8 g), and oxalic acid (0.70 g) as a catalyst was added dropwise to this solution over 30 minutes at 25° C., followed by stirring at 25° C. for 30 minutes. Then, after heating using an oil bath and refluxing for 30 minutes, the mixed solution of the methanol solution (1.20g) and ECS (0.90g) which content of E4 prepared beforehand was 92 mass % was added. After further reflux for 30 minutes, it was naturally cooled to obtain SiO 2 The polysiloxane solution (1) whose conversion density|concentration is 12 mass %.

Synthetic example 2

[0307] In a 200 ml four-necked reaction flask equipped with a thermometer and reflux tube, PGME (28.3 g), E1 (8.20 g), E3 (19.9 g) and E5 (20.0 g) were mixed to prepare a solution of the alkoxysilane monomer. A solution prepared by mixing PGME (19.1 g), water (10.8 g), and oxalic acid (1.10 g) as a catalyst was added dropwise to this solution over 30 minutes at 25° C., followed by stirring at 25° C. for 30 minutes. Then, after heating using an oil bath and refluxing for 30 minutes, the mixed solution of the methanol solution (1.20g) and PGME (0.90g) with the content of E4 prepared beforehand of 92 mass % was added. After further reflux for 30 minutes, it was naturally cooled to obtain SiO 2 The polysiloxane solution (2) whose conversion density|concentration is 12 mass %.

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Abstract

A liquid crystal display element obtained by disposing a liquid crystal composition containing a liquid crystal and a polymerizable compound that is polymerized by an active energy ray or heat between two substrates provided with an electrode, providing a liquid crystal alignment film to at least one of the substrates, performing curing in a state in which all or some of the liquid crystal composition is exhibiting liquid crystallinity, and forming a cured product composite of the liquid crystal and the polymerizable compound, the liquid crystal alignment film being formed of a liquid crystal alignment treatment agent containing the following component (A) and component (B). Component (A): a cellulose-based polymer having a specific structure. Component (B): a polysiloxane-based polymer having a specific structure.

Description

technical field [0001] The present invention relates to a transmissive-scattering liquid crystal display element that exhibits a transparent state when no voltage is applied and a scattering state when a voltage is applied, a liquid crystal alignment treatment agent for the element, and a liquid crystal alignment film. Background technique [0002] As a liquid crystal display element using a liquid crystal material, a TN (twisted nematic, Twisted Nematic) mode is actually used. This mode uses the optical rotation characteristics of liquid crystals to convert light, and polarizers are required when used as liquid crystal display elements. However, it is known that light utilization efficiency becomes low due to the use of polarizers. [0003] As a liquid crystal display element that has high light utilization efficiency and does not use a polarizer, there is a liquid crystal display element that switches between a transmissive state (also called a transparent state) and a sc...

Claims

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Application Information

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IPC IPC(8): G02F1/1337C08G77/04C08L1/08C08L83/04G02F1/1334
CPCC08L1/284C08L1/32C08L83/04C09K19/0422C09K19/406C09K19/54C09K19/56C09K2019/0448G02F1/1334G02F1/133711G02F1/133719G02F1/13347
Inventor 三木徳俊片山雅章巴幸司菊池奈穂保坂和義
Owner NISSAN CHEM IND LTD
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